I suspect that it wouldn't actually be that difficult to add XSLT support to a textmode browser, given that XSLT libraries exist and that XSLT in the browser is

I suspect that it wouldn't actually be that difficult to add XSLT support to a textmode browser, given that XSLT libraries exist and that XSLT in the browser is a straightforward application of it. They just haven't bothered with it.